Clamping device.



H. F. KRANTZ.

'CLAMPING DEVICE.

APPLICATION FILED NOV- 1. 1911'. RENEWED JULY ls. l9l8.

Patented May 6, 1919.

INVENTOR Hubert. f Krantz ATTORNEY WITNESSES? 75% 7% m. puma-Lima. wnsummmu, u, c,

UNITED STATES PATENT oEEo.

HUBERT F. KRANTZ, OF BROOKLYN, NEW YORK, ASSIGNOR TO KRANTZ MANUFACTUR- ING COMPANY, INC., OF BROOKLYN, NEW YORK, A CORPORATION NEW YORK.

OLAMPING- DEVICE.

Specification of Letters Patent.

Patented May 6, 1919.

Original application filed February 24, 1913, Serial No. 750,145. Divided and. this application filed Novemher 7, 1917, Serial No. 200,674.- Renewed July 15, 1918. Serial No. 245,068.

To all whom it may concern:

Be it known that I, HUBERT F. KRANTZ, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Clamping Devices, of which the following is a specification, this application being a division of application Serial No. 750,145, filed February 24, 1913. t

My invention relates to clamping devices and particularly to devices for securing switch terminal members to switch-board panels and other similar structures.

The object of my invention is to provide a simple and relatively inexpensive clamping device of the above indicated character that shall be suitable for various types of terminal members and be easily manipulated for securely mounting such members and for readily removing them, when desired.

In the accompanying drawings, Figure l is a side elevational view of a switch embodying my invention; Fig. 2 is a front elevational view of the switch shown in Fig. 1; Fig. 3 is a View taken along the line III-III of Fig. 2; Fig. 4 is a detail front elevational view of the clamping device shown in Fig. 3, and Fig. 5 is a perspective view of a switch terminal member embodying my invention.

As illustrated in the drawing, my invention is embodied in switch 1 that comprises a supporting panel or board 2, terminal members 3, 4, 5 and 6, clamping devices 7, and movable contact or knife-blade members 8 and 9.

The contact-terminal members 3 and 4 of the switch 1 extend through the panel board 2 and are suitably connected to bus bars 10, and the terminal members 5 and 6 also extend through the panel board and are connected, through fuses 11, to line terminals 12.

The panel board 2 is provided with a tapered opening 13 preferably of frustoconical shape for each of the terminal mem bers 3, 4, 5 and 6, substantially as shown in Fig. 3 of the drawing. A face plate 14, which is provided with an elongated opening 15 and with two small circular openings 16, for purposes to be hereinafter set forth, covers the smaller front end of each of openings 13 in the panel heart 1? Two clamping members 17 and 18, the adjacent sides of which are substantially flat and parallel and the outer sides of which are longitudinally inclined and circumferentially curved to fit into the tapered opening 13, constitute a two-part wedge. The adjacent faces of the clamping members 17 and 18 have projections 19 and engage side recesses 21 in the contact-terminal member with which they cooperate, it being understood that the recesses 21 may be joined to form a hole extending completely through the member or be merely of suflicient depth to receive the projections 19. Screws 22 project through the openings 16 in the face plate 14 and into the screw-threaded holes 20 in the members 17 and 18 and serve to force the members 17 and 18 forward to clamp the contact-terminal member rigidly in position. The length of the opening 15 in the face plate 14 is greater than the width of the coiiperating contact terminal member in order to permit the latter to be readily manipulated and withdrawn when released from the wedge members 17 and 18.

While I have described my invention with respect to one of the contact-terminal members, it will, of course, be understood that each of the contact-terminal members is similarly supported in the panel board 2. Also, my invention is neither limited to the particular form of contact-terminal member nor to the employment of two adjustable wedge members, it being apparent that the functions of my invention would not be impaired or materially changed if the structure at one side of the supported member had no adjustable parts.

I claim as my invention:

1. A clamping device comprising a supporting member having a tapered opening, a supported member and two clamping members of Wedge shape disposed in said opening, said supported member and said clamping members having interlocking means to prevent independent movement, a plate, and means cooperating with said plate to move the clamping members to their clamping positions and hold them therein.

2. A clamping device comprising a supporting member having a tapered opening, a supported member disposed in the opening and having a side recess, a wedge provided, with projection. to the in the supported member, a plate, and a means cooperating with said plate to move said wedge to clamping position and hold it therein,

3. The combination with a supporting member having an opening therein, of a supported member and a Wedge member disposed in said opening, one of said members having a side recess and the other a side projection for cooperative engagement, a plate, and means cooperating w ith said plate to move the wedge member to clamping posi- 111011 nd h ld it thereinl. A clamping. device comprising a sup,- porting mem er hav ng pered p ni g, a 1) Qrted member x end ng ough the opening, a plate disposed over the opening, a wedge havinga screw-thr d d ol th r in, and a, screw-threaded member for cooperating with said hole and the said plate to move the wedge into clamping position.

5. A clamping device comprising a supporting member having a tapered opening, a face plate covering the smaller end of said opening and having a plurality of openings, a supported member extending through one of the openings in the face plate and the tapered opening, a wedge having a screwthreaded hole therein, and a screw-threaded member projecting through one of the openings in the face plate and cooperating with the screw-threaded hole in the wedge to clamp the supported melllber in position in he up fi e m mbe In testimony whereof, I have hereunto subscribed my name this 23. day of, Oct. 1917.

UBE i 1 KRANTZ- (gop ie s of this lw tentl n ay pe obtained for five cents each, by addressing the Commissioner of Betentg.

washiugton n o," 

